From bde03f5da4258575ea3c813dfb7edd3c08fb3e5b Mon Sep 17 00:00:00 2001
From: waltem01 <simon.waltemathe@ptb.de>
Date: Thu, 30 Nov 2023 08:37:31 +0100
Subject: [PATCH] relocating into library files, overlay and hover effect and
 scaling

---
 Webserver/src/lib/client/color.ts         |  36 ++++
 Webserver/src/lib/client/gamepad.ts       |  21 +++
 Webserver/src/lib/client/matrix.ts        |  14 ++
 Webserver/src/lib/client/miscellaneous.ts |   3 +
 Webserver/src/lib/interfaces.ts           |   3 +
 Webserver/src/routes/+page.svelte         | 203 +++++++++++++++-------
 Webserver/tailwind.config.js              |   6 +-
 7 files changed, 215 insertions(+), 71 deletions(-)
 create mode 100644 Webserver/src/lib/client/color.ts
 create mode 100644 Webserver/src/lib/client/gamepad.ts
 create mode 100644 Webserver/src/lib/client/matrix.ts
 create mode 100644 Webserver/src/lib/client/miscellaneous.ts
 create mode 100644 Webserver/src/lib/interfaces.ts

diff --git a/Webserver/src/lib/client/color.ts b/Webserver/src/lib/client/color.ts
new file mode 100644
index 0000000..37390a5
--- /dev/null
+++ b/Webserver/src/lib/client/color.ts
@@ -0,0 +1,36 @@
+export interface Color {
+	r: number;
+	g: number;
+	b: number;
+}
+
+export function getContrastColor(hexColor: string): string {
+	const rgb = hexToRgb(hexColor);
+	const luminance = getLuminance(rgb ?? ({ r: 0, g: 0, b: 0 } as Color));
+	return luminance > 0.5 ? '000000' : 'FFFFFF';
+}
+
+export function hexToRgb(hex: string): Color | null {
+	const result = /^([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
+	return result
+		? {
+				r: parseInt(result[1], 16),
+				g: parseInt(result[2], 16),
+				b: parseInt(result[3], 16)
+		  }
+		: null;
+}
+
+export function getLuminance(rgb: Color): number {
+	const a = [rgb.r, rgb.g, rgb.b].map((v) => {
+		v /= 255;
+		return v <= 0.03928 ? v / 12.92 : Math.pow((v + 0.055) / 1.055, 2.4);
+	});
+	return 0.2126 * a[0] + 0.7152 * a[1] + 0.0722 * a[2];
+}
+
+export function rgbToHex(color: Color): string {
+	return (Object.entries(color) as [string, number][])
+		.map((e) => e[1].toString(16).padStart(2, '0'))
+		.join('');
+}
diff --git a/Webserver/src/lib/client/gamepad.ts b/Webserver/src/lib/client/gamepad.ts
new file mode 100644
index 0000000..dc3540f
--- /dev/null
+++ b/Webserver/src/lib/client/gamepad.ts
@@ -0,0 +1,21 @@
+export interface Coordinates {
+	x: number;
+	y: number;
+}
+
+export function detectGamepad() {
+	const gps = navigator.getGamepads();
+	if (gps.length === 0) return null;
+
+	return gps[0];
+}
+
+export function gamepadButtonPress(gamepad: Gamepad | null, gameCoords: Coordinates) {
+	if (!gamepad) return;
+
+	gamepad.axes.forEach((axis, index) => {
+		if (Math.abs(axis) !== 1) return;
+		if (index === 1) gameCoords.y += axis;
+		if (index === 0) gameCoords.x += axis;
+	});
+}
diff --git a/Webserver/src/lib/client/matrix.ts b/Webserver/src/lib/client/matrix.ts
new file mode 100644
index 0000000..154ef3d
--- /dev/null
+++ b/Webserver/src/lib/client/matrix.ts
@@ -0,0 +1,14 @@
+export interface MatrixCell {
+	xIndex: number;
+	yIndex: number;
+	color: string;
+}
+
+export function initializeMatrix(scaling: number): MatrixCell[][] {
+	return Array.from({ length: 192 / scaling }, (_, yIndex) =>
+		Array.from(
+			{ length: 192 / scaling },
+			(_, xIndex) => ({ xIndex, yIndex, color: '000000' }) as MatrixCell
+		)
+	) as MatrixCell[][];
+}
diff --git a/Webserver/src/lib/client/miscellaneous.ts b/Webserver/src/lib/client/miscellaneous.ts
new file mode 100644
index 0000000..4d5030c
--- /dev/null
+++ b/Webserver/src/lib/client/miscellaneous.ts
@@ -0,0 +1,3 @@
+export function toRadians(degrees: number): number {
+	return (degrees / 180) * Math.PI;
+}
diff --git a/Webserver/src/lib/interfaces.ts b/Webserver/src/lib/interfaces.ts
new file mode 100644
index 0000000..c1e03cb
--- /dev/null
+++ b/Webserver/src/lib/interfaces.ts
@@ -0,0 +1,3 @@
+export interface APIResponse {
+	success: boolean;
+}
diff --git a/Webserver/src/routes/+page.svelte b/Webserver/src/routes/+page.svelte
index 29cd3a1..e4c3642 100644
--- a/Webserver/src/routes/+page.svelte
+++ b/Webserver/src/routes/+page.svelte
@@ -1,13 +1,10 @@
 <script lang="ts">
-	interface MatrixResponse {
-		success: boolean;
-	}
-
-	interface MatrixCell {
-		xIndex: number;
-		yIndex: number;
-		color: string;
-	}
+	import { detectGamepad, gamepadButtonPress } from '$lib/client/gamepad';
+	import { rgbToHex, type Color, getContrastColor } from '$lib/client/color';
+	import { initializeMatrix } from '$lib/client/matrix';
+	import { toRadians } from '$lib/client/miscellaneous';
+	import type { APIResponse } from '$lib/interfaces';
+	import { onMount } from 'svelte';
 
 	async function get(event: SubmitEvent) {
 		clearMatrix();
@@ -17,7 +14,7 @@
 		const response = await fetch(`http://localhost:8080/${form.dataset.endpoint}`, {
 			mode: 'cors'
 		});
-		const mdata = (await response.json()) as MatrixResponse;
+		const mdata = (await response.json()) as APIResponse;
 		if (!mdata.success) alert(`Error while processing '${form.dataset.endpoint}'!`);
 	}
 
@@ -49,7 +46,7 @@
 			mode: 'cors',
 			body: fdata
 		});
-		const mdata = (await response.json()) as MatrixResponse;
+		const mdata = (await response.json()) as APIResponse;
 		if (!mdata.success) alert(`Error while processing '${form.dataset.endpoint}'!`);
 	}
 
@@ -60,7 +57,7 @@
 		const y = parseInt((formData.get('y') as string) ?? '191');
 		const r = parseInt((formData.get('r') as string) ?? '95');
 
-		const hex = colorToHex();
+		const hex = rgbToHex(pixelColor);
 		for (let a = 0; a < 360; a++) {
 			const nx = Math.round(Math.cos(toRadians(a)) * r + x);
 			const ny = Math.round(Math.sin(toRadians(a)) * r + y);
@@ -69,17 +66,13 @@
 		}
 	}
 
-	function toRadians(degrees: number): number {
-		return (degrees / 180) * Math.PI;
-	}
-
 	function drawRectangle(formData: FormData) {
 		const x = parseInt((formData.get('x') as string) ?? '191');
 		const y = parseInt((formData.get('y') as string) ?? '191');
 		const w = parseInt((formData.get('w') as string) ?? '191');
 		const h = parseInt((formData.get('h') as string) ?? '191');
 
-		const hex = colorToHex();
+		const hex = rgbToHex(pixelColor);
 		for (let j = y; j < y + h; j++) for (let i = x; i < x + w; i++) matrix[j][i].color = hex;
 	}
 
@@ -87,7 +80,7 @@
 		const x = parseInt((formData.get('x') as string) ?? '191');
 		const y = parseInt((formData.get('y') as string) ?? '191');
 
-		matrix[y][x].color = colorToHex();
+		matrix[y][x].color = rgbToHex(pixelColor);
 	}
 
 	function clearMatrix() {
@@ -95,44 +88,82 @@
 	}
 
 	function colorSelect(formData: FormData) {
-		pixelColor[0] = parseInt((formData.get('r') as string) ?? '255');
-		pixelColor[1] = parseInt((formData.get('g') as string) ?? '255');
-		pixelColor[2] = parseInt((formData.get('b') as string) ?? '255');
+		pixelColor.r = parseInt((formData.get('r') as string) ?? '255');
+		pixelColor.g = parseInt((formData.get('g') as string) ?? '255');
+		pixelColor.b = parseInt((formData.get('b') as string) ?? '255');
 	}
 
 	async function setMousePixel(event: MouseEvent) {
 		if (!mousePressed) return;
 
 		const parent = event.target as HTMLTableCellElement;
-		const x = parseInt(parent.dataset.x ?? '0');
-		const y = parseInt(parent.parentElement?.dataset.y ?? '0');
+		let x = parseInt(parent.dataset.x ?? '0');
+		let y = parseInt(parent.parentElement?.dataset.y ?? '0');
 
-		matrix[y][x].color = colorToHex();
+		const next = rgbToHex(pixelColor);
+		if (matrix[y][x].color === next) return;
+		matrix[y][x].color = next;
 
 		const fdata = new FormData();
+		const isScaled = scaling > 1;
+		if (isScaled) {
+			x *= scaling;
+			y *= scaling;
+
+			fdata.append('w', scaling.toString());
+			fdata.append('h', scaling.toString());
+		}
+
 		fdata.append('x', x.toString());
 		fdata.append('y', y.toString());
 
 		// TODO: Calling API via server-side
-		const response = await fetch('http://localhost:8080/pixel', {
+		const response = await fetch(`http://localhost:8080/${isScaled ? 'rectangle' : 'pixel'}`, {
 			method: 'POST',
 			mode: 'cors',
 			body: fdata
 		});
-		const mdata = (await response.json()) as MatrixResponse;
+		const mdata = (await response.json()) as APIResponse;
 		if (!mdata.success) alert("Error while processing 'pixel'!");
 	}
 
-	function colorToHex(): string {
-		return pixelColor.map((e) => e.toString(16).padStart(2, '0')).join('');
+	function correctSlider(event: Event) {
+		const slider = event.target as HTMLInputElement;
+
+		let current = parseInt(slider.value);
+		while (192 % current !== 0) current--;
+
+		scaling = current;
+		padding = 0.1875 * scaling;
+
+		matrix = initializeMatrix(scaling);
 	}
 
-	const matrix = Array.from({ length: 192 }, (_, yIndex) =>
-		Array.from({ length: 192 }, (_, xIndex) => ({ xIndex, yIndex, color: '000000' }) as MatrixCell)
-	) as MatrixCell[][];
-
-	const pixelColor = [255, 255, 255];
+	let scaling = 3,
+		padding = 0.5625;
 	let mousePressed = false;
+	let gamepad: Gamepad | null = null;
+	let matrix = initializeMatrix(scaling);
+
+	const gameCoords = { x: 0, y: 0 };
+	const pixelColor = { r: 255, g: 255, b: 255 } as Color;
+
+	onMount(() => {
+		setInterval(() => {
+			if (gamepad) return;
+			gamepad = detectGamepad();
+		}, 1000);
+
+		setInterval(() => gamepadButtonPress(gamepad, gameCoords), 100);
+
+		window.addEventListener('gamepadconnected', (e) => {
+			if (e.gamepad.index === 0) gamepad = e.gamepad;
+		});
+
+		window.addEventListener('gamepaddisconnected', (e) => {
+			if (e.gamepad.id === gamepad?.id) gamepad = null;
+		});
+	});
 </script>
 
 <h1 class="text-4xl font-bold m-5 text-center">Matrix Control Panel</h1>
@@ -203,7 +234,7 @@
 			required
 		/>
 		<input
-			class="border-2 border-black border-b-0 hover:bg-gray-200"
+			class="border-2 border-black border-b-0 hover:bg-gray-200 cursor-pointer"
 			id="color"
 			name="color"
 			type="submit"
@@ -225,7 +256,7 @@
 			name="x"
 			type="number"
 			min="0"
-			max="191"
+			max={192 / scaling - 1}
 			step="1"
 			value="0"
 			required
@@ -237,7 +268,7 @@
 			name="y"
 			type="number"
 			min="0"
-			max="191"
+			max={192 / scaling - 1}
 			step="1"
 			value="0"
 			required
@@ -266,7 +297,7 @@
 			name="x"
 			type="number"
 			min="0"
-			max="191"
+			max={192 / scaling - 1}
 			step="1"
 			value="177"
 			required
@@ -278,7 +309,7 @@
 			name="y"
 			type="number"
 			min="0"
-			max="191"
+			max={192 / scaling - 1}
 			step="1"
 			value="0"
 			required
@@ -289,7 +320,7 @@
 			name="w"
 			type="number"
 			min="0"
-			max="191"
+			max={192 / scaling - 1}
 			step="1"
 			value="15"
 			required
@@ -301,7 +332,7 @@
 			name="h"
 			type="number"
 			min="0"
-			max="191"
+			max={192 / scaling - 1}
 			step="1"
 			value="15"
 			required
@@ -329,7 +360,7 @@
 			name="x"
 			type="number"
 			min="0"
-			max="191"
+			max={192 / scaling - 1}
 			step="1"
 			value="20"
 			required
@@ -341,7 +372,7 @@
 			name="y"
 			type="number"
 			min="0"
-			max="191"
+			max={192 / scaling - 1}
 			step="1"
 			value="171"
 			required
@@ -352,7 +383,7 @@
 			name="r"
 			type="number"
 			min="0"
-			max="95"
+			max={96 / scaling - 1}
 			step="1"
 			value="20"
 			required
@@ -367,35 +398,35 @@
 	</form>
 
 	<form class="grid grid-cols-8" method="POST" data-endpoint="text" on:submit|preventDefault={post}>
-		<label class="border-2 border-black border-r-0 pl-1" for="text">Text:</label><label
-			class="border-2 border-black border-r-0 pl-1"
+		<label class="border-2 border-black border-r-0 border-b-0 pl-1" for="text">Text:</label><label
+			class="border-2 border-black border-r-0 border-b-0 pl-1"
 			for="tx">X:</label
 		>
 		<input
-			class="border-2 border-black border-r-0 cursor-text pl-1 bg-gray-100"
+			class="border-2 border-black border-r-0 border-b-0 cursor-text pl-1 bg-gray-100"
 			id="tx"
 			name="x"
 			type="number"
 			min="0"
-			max="191"
+			max="20"
 			step="1"
 			value="8"
 			required
 		/>
-		<label class="border-2 border-black border-r-0 pl-1" for="ty">Y:</label>
+		<label class="border-2 border-black border-r-0 border-b-0 pl-1" for="ty">Y:</label>
 		<input
-			class="border-2 border-black border-r-0 cursor-text pl-1 bg-gray-100"
+			class="border-2 border-black border-r-0 border-b-0 cursor-text pl-1 bg-gray-100"
 			id="ty"
 			name="y"
 			type="number"
 			min="0"
-			max="191"
+			max="9"
 			step="1"
 			value="9"
 			required
-		/><label class="border-2 border-black border-r-0 pl-1" for="tin">Input:</label>
+		/><label class="border-2 border-black border-r-0 border-b-0 pl-1" for="tin">Input:</label>
 		<input
-			class="border-2 border-black border-r-0 cursor-text pl-1 pr-1 bg-gray-100"
+			class="border-2 border-black border-r-0 border-b-0 cursor-text pl-1 pr-1 bg-gray-100"
 			id="tin"
 			name="text"
 			type="text"
@@ -403,32 +434,72 @@
 			required
 		/>
 		<input
-			class="border-2 border-black cursor-pointer hover:bg-gray-200"
+			class="border-2 border-black border-b-0 cursor-pointer hover:bg-gray-200"
 			id="text"
 			name="text"
 			type="submit"
 			value="Submit"
 		/>
 	</form>
+
+	<form class="grid grid-cols-3" on:submit|preventDefault>
+		<label class="border-2 border-black border-r-0 pl-1" for="text">Scaling:</label>
+		<div class="flex pl-1 pr-1 border-2 border-black border-r-0 bg-gray-100">
+			<input
+				class="w-full cursor-pointer"
+				id="scale"
+				name="scale"
+				type="range"
+				min="1"
+				max="64"
+				step="1"
+				bind:value={scaling}
+				on:change={correctSlider}
+				required
+			/>
+		</div>
+		<input
+			class="border-2 border-black cursor-text pl-1 bg-gray-100"
+			type="number"
+			min="1"
+			max="64"
+			step="1"
+			bind:value={scaling}
+			on:change={correctSlider}
+			required
+		/>
+	</form>
 </div>
 <div class="flex justify-center">
-	<!-- svelte-ignore a11y-no-noninteractive-element-interactions -->
-	<table
-		class="mt-5"
-		on:mousedown|preventDefault={() => (mousePressed = true)}
-		on:mouseup|preventDefault={() => (mousePressed = false)}
-	>
+	<table id="main" class="mt-5 border-2 border-black">
 		{#each matrix as row}
-			<tr data-y={row[0].yIndex}>
+			<tr>
 				{#each row as cell}
-					<td
-						data-x={cell.xIndex}
-						class="p-0.75"
-						style="background-color: #{cell.color};"
-						on:mouseenter={setMousePixel}
-					/>
+					<td style="padding: {padding}rem; background-color: #{cell.color}" />
 				{/each}
 			</tr>
 		{/each}
 	</table>
+	<div class="absolute z-10">
+		<!-- svelte-ignore a11y-no-noninteractive-element-interactions -->
+		<table
+			id="overlay"
+			class="mt-5 border-2 border-transparent"
+			on:mousedown|preventDefault={() => (mousePressed = true)}
+			on:mouseup|preventDefault={() => (mousePressed = false)}
+		>
+			{#each matrix as row}
+				<tr data-y={row[0].yIndex}>
+					{#each row as cell}
+						<td
+							data-x={cell.xIndex}
+							style="padding: {padding}rem; background-color: #{getContrastColor(cell.color)}"
+							class="opacity-0 hover:opacity-50"
+							on:mousemove={setMousePixel}
+						/>
+					{/each}
+				</tr>
+			{/each}
+		</table>
+	</div>
 </div>
diff --git a/Webserver/tailwind.config.js b/Webserver/tailwind.config.js
index 1cb5f5d..bfe0bc2 100644
--- a/Webserver/tailwind.config.js
+++ b/Webserver/tailwind.config.js
@@ -2,11 +2,7 @@
 export default {
 	content: ['./src/**/*.{html,js,svelte,ts}'],
 	theme: {
-		extend: {
-			spacing: {
-				0.75: '0.1875rem'
-			}
-		}
+		extend: {}
 	},
 	plugins: []
 };